Signal-gate for draw-bridges



(No Model.) 2 Sheets-Sheet 1. D. B. FISK.

SIGNAL GATE FOR DRAW BRIDGES.

No. 326,965. Patented Sept. 29, 1885.

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(No Model.) 2 Sheets-Sheet 2. D. B. FISK.

I SIGNAL GATE FOR DRAW BRIDGES. No. 326,965. Patented Sept. 29, 1885.

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DARWIN B. FISK, OF KALAMAZOO, MICHIGAN.

SIGNAL-GATE FOR DRAW-BRIDGES.

SPECIFICATION forming part of Letters Patent No. 326,965, datedSeptember 29, 1885.

Application tiled June 13, 1884. Renewed August 10, 12 85. (No model.) I

To aZZ whom/ it may concern:

Be it known that I, DARWIN B. FIsK, a citizen of the United States,residing atKalamazoo, in the county ofKalamazoo and State ofMichigan,have invented certain new and useful Improvements in Gates forDraw-Bridges; and I do declare the following to be a full, clear, andexact description of my invention, such as will enable others skilled inthe art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to letters or figures of referencemarked thereon, which form apart of this specification.

My invention relates to that class of gates having signals attachedthereto for the purpose of closing a street or railway-line at theentrance to a draw-bridge.

- The object of my invention is to prevent accidents while the bridge isopen, and to operate the gates by bridge swinging in either direction. Iattain these objects by the mechanism illustrated in the accompanyingdrawings, in WD1CD Figure 1 is a side elevation of a gate suspended overthe roadway, and mechanism operating the same, and also showing asignalcase. Fig. 2 is a plan view showing pulleys, pinion-gear, and rackattached to the bridge for operating the same. Fig. 3 represents aportion of a frame inclosed in a signal-case, carrying glasses forsignal purposes. Fig. at is a perspective view of bridge and gatepartially open, showing rack for operating the gate. Fig. 5 isasectionalview of signal-case, taken on dotted line 1 1, Fig. 6, showingframe carrying signals. Fig. 6 is a sectional view taken on dotted lines2 2, Figs. 5 and 7. Fig. 7 is a sectional view taken on dotted line 8 3,Fig. 6, showing position of lamp for signal purposes. Fig. 8 is amodification of elevating device, Fig. 1.

Similar letters refer to similar parts throughout the several views.

The gate P is suspended by means of chains or belts c, passing overpulleys rrnear the top of columns a a, and is guided by eyebolts 1/,attached to gate, sliding on rods It R, as shown in Fig. l.

P, Fig. 1, represents in dotted lines the position of gate and signalswhen the bridge is closed.

P represents the position of gate and signals when the bridge is open.

D represents a portion of the bridge carrying rack '1]. By moving D ineither direction, as indicated by arrows, Figs. 1 and 2. therack oengages with pinion-gear tt. thereby rotating shafts carrying pulleys lala and z 2.

In opening or closing gate P it is necessary to operate both ends of thegate at the same time, which is accomplished by means of crossed chainbelt a operating pulleys z z in opposite directions, and by means ofchain belt 0 the gate is lowered to a closed position when the bridge isopening in either direction, and by means of chain belt 0 the gate israised to an open position when the bridge is closing from eitherdirection. The weights to w, inclosed in hollow columns a and attachedto chain or belt 0, counterbalance the weight of gate and signals, theweights w to taking the position shown in dotted lines Fig. 1, when thegate is closed.

When the gate is raised, the upper ends, 6 e, of frame in signal-caseengage with projections 0 6, attached to bar 3 at the top of hollowcolumns, forcing the frame downward, thereby exposing the word Open atthe lower end of signal-case c, and at the same time concealing the wordClosed in the upper end of signal-case 0, thereby indicating that thebridge is closed andthe street or railway-line is open.

Vhen the gate is lowered, the ends f f of frameiin signal-case c engagewith projections m on roadway A, Figs. 1 and 4, the frame is forcedupward, exposing the word Closed at the top of signal-case c, and at thesame time concealing the word Open in thelower end of signal-case 0,thereby indicating that the bridge is open and the street or railwaylineis closed.

The frame a 13, carrying the words Open and Closed, also carries framesh h, containing glasses indicating safety and danger. The signal-case cis provided with an aperture, 00, centrally located for the display ofsignallights. \Vhen the frame 1' t is forced upward, the danger-signalglass at is carried between aperture a; in signal-case and light ofsignallamp 9, thereby indicating danger, and that the bridge is open andstreet or railway-line ICO is closed, and when the frame i i is forceddownward the safety-signal glass (1 is carried between aperture w insignal-case and light of signal-lamp g, thereby indicating safety, andthat the bridge is closed and the street or railway-line is open. Theframe a 13, carrying signals, is held in position at any point by meansof springs attached to the inside of signal-case, as shown at Z, Fig. 7.

The lamp is held in position by brackets T T, attached to inside ofsignal-case, as shown in Fig. 7.

When bridges are of great width, a modification of the elevating devicemay be used, as shown in Fig. 8. Sliding and hinged gates may beoperated by similar means.

Having fully described my invention, whatI desire to claim and secure byLetters Patent 1. In combination with a draw-bridge, the suspendedcounterbalancedgate P, the signalcase attached thereto for inclosing andprotecting signals, the frame carrying signals, and means for operatingthe same, as shown and described.

2. The combination, with an automaticallyoperating gate and signals,chains 0'0", counterbalance-Weights, pulleysr r,hollow columns inclosingthe weights, pulleys kk, pulleys zz', crossed chain a, and pinions t t,of a swingbridge having a rack, '12, substantially as described.

3. The automatically-operating gate and sig nals, the chain or belt 0',attached to the gate DARWIN B. FISK.

Witnesses:

J. H. -HOBART BABCOOK, LEVI W. SLAUGHTER.

